The System Sensor 2D51 is a four-wire photoelectric duct smoke detector head for HVAC duct housings. First, it detects smoke traveling inside air-handling ductwork. Therefore, it helps stop smoke from spreading through a building’s ventilation system.
The 2D51 installs as the sensing head within a compatible System Sensor duct housing. As a result, sampling tubes draw duct air across the photoelectric chamber. In addition, the four-wire design provides separate power and signal connections.
System Sensor 2D51 duct detection
Engineers specify duct detection where standard area detectors cannot reach moving air. Also, the photoelectric chamber responds to visible smoke particles in the airstream. Furthermore, duct detection commonly supports automatic fan or damper shutdown on alarm.
- Four-wire photoelectric duct smoke detector head
- Installs in a compatible System Sensor duct housing
- Monitors smoke within HVAC ductwork
- Photoelectric light-scattering sensing
- Suited to commercial and institutional air-handling systems
Finally, confirm the correct duct housing and panel compatibility for your system. However, always follow the manufacturer’s duct-detector installation guidance.
For more information, contact the Life Safety Consultants team at (888) 557-0558, or email us at: sales@lifesafetycom.com
Additional information
| Weight | 0.6 lbs |
|---|---|
| Dimensions | 5 × 4.5 × 2 in |
| Condition | New |
| Manufacturers | System Sensor |
| Part Type | Photoelectric Smoke Detector |







